发明名称 |
OPTICAL FIBRE MANUFACTURE |
摘要 |
<p>J. Irven-A.P. Harrison 12-2(Revision) METHOD OF MANUFACTURING OPTICAL FIBRE PREFORMS In the manufacture of silica optical fibers a tube having an internal coating of a volatile dopant is locally heated by a hot zone repeatedly traversed along its length to promote shrinkage and finally collapse of the tube bore. During the shrinkage prior to the final collapse traversal a gas flow of oxygen and a halide of the volatile dopant is maintained through the tube in order firstly to provide a small overpressure to ensure circularity in the shrinkage and secondly to compensate for the tendency for dopant to be lost by volatilization.</p> |
申请公布号 |
CA1097503(A) |
申请公布日期 |
1981.03.17 |
申请号 |
CA19780299794 |
申请日期 |
1978.03.28 |
申请人 |
INTERNATIONAL STANDARD ELECTRIC CORPORATION |
发明人 |
IRVEN, JOHN;HARRISON, ANDREW P. |
分类号 |
C03B37/018;G02B6/00;(IPC1-7):03B23/04 |
主分类号 |
C03B37/018 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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